An LED illuminating device includes an optical section, an electrical section, and a heat dissipation section therebetween. The optical section includes a light source. The electrical section electrically connects with the light source. The heat dissipation section includes a mounting seat, a heat pipe and a heat sink. The heat pipe includes an evaporation section fixed on the mounting seat and thermally connecting with the light source and a condenser section. The heat sink includes a plurality of umbrella-shaped fins each including a main body perpendicular to the condenser section of the heat pipe and two flanges angling downward from two opposite edges of the main body towards the light source. A plurality of air venting holes are defined in the main body and the flanges of each fin.
Legal claims defining the scope of protection, as filed with the USPTO.
1. An LED illuminating device, comprising: an optical section at a bottom end of the LED illumination device, the optical section comprising a light source and a light output housing around the light source; an electrical section at a top end of the LED illumination device, the electrical section electrically connecting with the light source; and a heat dissipation section between the optical section and the electrical section comprising: a mounting seat to which the light source is attached; a heat pipe comprising an evaporation section and at least one condenser section, the evaporation section fixed on the mounting seat and thermally connected with the light source; and a heat sink in which the at least one condenser section of the heat pipe is received, the heat sink comprising a plurality of fins each comprising at least one umbrella-shaped portion, each of the umbrella-shaped portions comprising a main body perpendicular to the at least one condenser section of the heat pipe and two flanges angling downward from two opposite edges of the main body towards the light source, a plurality of air venting holes being defined in the main body and the flanges of each fin, whereby air between each two neighboring fins is heated and rises via the air venting holes to a top side of the heat sink during operation of the LED illuminating device.
2. The LED illuminating device of claim 1 , wherein the condenser section extends through the main body of the umbrella-shaped portion from the bottom to the top of the heat sink.
3. The LED illuminating device of claim 2 , wherein the mounting seat comprises a bottom wall and an annular sidewall extending upwardly from the bottom wall, the heat pipe being straight, and the evaporation section being enclosed by the sidewall and having a planar end surface contacting the bottom wall.
4. The LED illuminating device of claim 1 , wherein each of the fins comprises two umbrella-shaped portions, each of the fins further comprising a connecting portion between the two umbrella-shaped portions, and the umbrella-shaped portions of each fin are symmetrical with respect to the connecting portion.
5. The LED illuminating device of claim 4 , wherein the heat pipe comprises two condenser sections and is U-shaped, and wherein the mounting seat is disposed on the evaporation section of the heat pipe, one of the condenser sections extends through the main body of each umbrella-shaped portion located on one side of the connecting portion from the bottom to the top of the heat sink, the other condenser section extending through the main body of each umbrella-shaped portion located on an opposite side of the connecting portion.
6. The LED illuminating device of claim 5 , wherein the mounting seat is saddle-shaped and defines a groove at a top side receiving the evaporation section of the heat pipe therein, and the light source is attached to a bottom surface of the mounting seat.
7. The LED illuminating device of claim 1 , wherein the heat dissipation section further comprises a frame supporting the heat sink and a holder mechanically connecting the heat dissipation section with the electrical section, the frame comprising a base and a plurality of arms extending backward, with the frame and the base cooperatively defining a space receiving the heat pipe, the heat sink and the mounting seat therein.
8. The LED illuminating device of claim 7 , wherein the heat sink defines a plurality of latching grooves at an outer circumferential surface thereof, and the arms are received in the latching grooves, respectively.
9. The LED illuminating device of claim 7 , wherein the heat sink defines a plurality of through holes therein, the holder defines a plurality of through holes therein, and a plurality of electric wires extend from the light source through the through holes of the heat sink and the holder to electrically connect the light source with the electrical section.
10. The LED illuminating device of claim 1 , wherein the electrical section comprises an enclosure, a power source providing an electrode at a bottom end of the enclosure and a circuit board connecting the enclosure with the heat dissipation section, the circuit board electrically connecting the light source via electric wires and the power source via the electrode, respectively.
11. The LED illuminating device of claim 10 , wherein the electrical section further comprises a cover at a top end of the enclosure and an elastic member between the enclosure and the cover, the elastic member being compressed when the enclosure and the cover fixedly connect, such that the electrode of the power source firmly contacts a pin of the circuit board due to resilient force of the elastic member.
12. The LED illuminating device of claim 10 , wherein the electrical section further comprises a switch controlling the on-off state of the LED illuminating device.
13. A light engine of an LED illuminating device, comprising: a light source; a mounting seat to which the light source is attached; a heat pipe comprising an evaporation section and at least one condenser section, the evaporation section fixed on the mounting seat and thermally connected with the light source; and a heat sink in which the at least one condenser section of the heat pipe is received, the heat sink comprising a plurality of fins each comprising at least one umbrella-shaped portion, the at least one umbrella-shaped portion comprising a main body perpendicular to the at least one condenser section of the heat pipe and two flanges angling downward from two opposite edges of the main body towards the light source, a plurality of air venting holes being defined in the main body and the flanges of the at least one umbrella-shaped portion of each fin, whereby air between each two neighboring fins is heated and rises via the air venting holes to a top side of the heat sink during operation of the light engine.
14. The light engine of the LED illuminating device of claim 13 , wherein the condenser section extends through the main body of the at least one umbrella-shaped portion from the bottom to the top of the heat sink, the evaporation section having a planar end surface contacting the mounting seat.
15. The light engine of the LED illuminating device of claim 13 , wherein each fin comprises two umbrella-shaped portions, the umbrella-shaped portions being symmetrical with respective to a centre of the fin, and wherein the heat pipe comprises two condenser sections, one extending through the main body of each umbrella-shaped portion located on one side of each of the fins from the bottom to the top of the heat sink, and the other condenser section extending through the main body of each umbrella-shaped portion located on an opposite side of each of the fins from the bottom to the top of the heat sink.
Cooperative Patent Classification codes for this invention. Click any code to explore related patents in that topic.
March 17, 2009
March 29, 2011
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